Milline GCD niit vastutab edastatud koodi ploki täitmise eest?

In GCD (Grand Central Dispatch), the execution of the passed code block occurs in a dispatch queue. The code block is placed in the queue, and then the system selects a thread for its execution. Thus, the thread is not chosen directly by the developer but managed by the system. It is important to understand that GCD uses a thread pool, and the specific thread on which the block will be executed can change.

Example of creating and executing a block in the global queue:

DispatchQueue.global().async {
    // Code that will be executed asynchronously on one of the pool's threads
    print("Execution of the block")
}